I did some work (temporary) back in 2011 on the same machine.
IIRC, I ran two programs, neither required a download/install.
I think they ran on a VPN.
They may have upgraded things on their end.
Any chance you could try things out with your current setup? If it doesn’t work or perform adequately then I’d just go with a new machine just for the no-hassle factor, but that’s just me.